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CHAPTERFOUR Environmental Consequences and Mitigation <br />protohistoric, and historic rock art; protohistoric wikiups; and historic irrigation ditches. All of <br />these types of resources could potentially be impacted by subsidence. <br />Railroad <br />Construction of the railroad would not affect any significant cultural resources. <br />Water Pipeline <br />Construction of the water pipeline would not affect any significant cultural resources. <br />Transmission Line <br />The proposed transmission line corridors have not been surveyed for cultural resources; <br />therefore, it is not known if these features would affect any significant cultural resources. <br />However, siting of the power poles and access roads is flexible; therefore, it is probable that the <br />transmission line would be constructed without affecting any significant cultural resources. <br />Temporary and Permanent Impacts <br />There are no anticipated temporary or permanent impacts to cultural resources from the proposed <br />action. <br />Mitigation Measures <br />Because the proposed action or the alternatives would not affect any significant cultural <br />resources, no mitigation measures, other than site avoidance, would be required. Access to one <br />eligible site, SME15398, will be limited by fencing potential access points. As discussed in <br />Section 3.2.2, subsidence in the proposed lease area will be monitored for the potential to affect <br />cultural resources. If surface fissuring is found to be occurring in areas, the proponent will <br />consult with the BLM on an appropriate plan to avoid any adverse effects to significant cultural <br />resources. <br />When a transmission line alternative is selected, a cultural resources survey will be conducted. <br />Alternatives Carried Forward for Further Consideration <br />Grade-Separated Crossing at CR M.8 <br />Construction of the grade-separated crossing at CR M 8 would not affect any significant cultural <br />resources. <br />Four-Quadrant Traffic Control Devices <br />Use of quadrant traffic control devices would not affect any significant cultural resources. <br />Transmission Line Alternative A <br />The proposed transmission line corridors have not be surveyed for cultural resources; therefore, <br />it is not known if these features would affect any significant cultural resources. However, siting <br />of the power poles and access roads is flexible; therefore, it is probable that this alternative <br />would be constructed without affecting any significant cultural resources. <br />Transmission Line Alternative B <br />The proposed transmission line corridors have not been surveyed for cultural resources; <br />therefore, it is not known if these features would affect any significant cultural resources. <br />4-63 <br />DBMS 618 <br />